Rear light - no voltage

[HaloJones]

Hiya - Just wondered if anyone could possibly help with a problem that is driving me nuts!!

Problem:
Near side rear light not coming on (Voltage for lamp feed is 0V when measured in cluster panel)
All other lights function correctly.
[Brake light on dimly (OK - that's as it should be if a faulty rear light is detected)]

Checked:
Bulb (and swapped for known good)
Voltage is 0V for bulb supply (the problem)
No water ingress anywhere

Does anyone have any suggestion as to how I can track down this problem?

Many thanks

[klarzy]

Originally Posted by HaloJones

Hiya - Just wondered if anyone could possibly help with a problem that is driving me nuts!!

Problem:
Near side rear light not coming on (Voltage for lamp feed is 0V when measured in cluster panel)
All other lights function correctly.
[Brake light on dimly (OK - that's as it should be if a faulty rear light is detected)]

Checked:
Bulb (and swapped for known good)
Voltage is 0V for bulb supply (the problem)
No water ingress anywhere

Does anyone have any suggestion as to how I can track down this problem?

Many thanks

you can check the connector plug on top of the light switch module (behind the light switch in the dash).

open and replug a few times to break any corrosion.

do you get the bulb out warning??

[HaloJones]

Thanks for that suggestion. Will try in a few minutes... it's just started chucking it down here!!

Yes, I do get the dash warning.

[klarzy]

Originally Posted by HaloJones

Thanks for that suggestion. Will try in a few minutes... it's just started chucking it down here!!

Yes, I do get the dash warning.

If the earth is good and the bulb holder back to the LSM is a good circuit then try a different LSM for a minute.
if the circuit back to the LSM is open or grounded then check for damage to the cable, plugs or headers.

[HaloJones]

Problem solved!

Turns out it was pin 2 on the cluster & connector had excessive verdigris!! Thought I'd cleaned it well enough (and used contact cleaner) - but not good enough apparently. When I metered it I hadn't spotted how bad it still was!

Thanks for the suggestions, appreciated.

[Astraeus]

Another excellent forum result.


This place really is worth its subscription.


Chris